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The composition of Natal wattle bark : (third article)
Williams, C. O. - 1920
Persistent link: https://www.econbiz.de/10003366382
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Some further remarks on tobacco cultivation for nicotine
Cutler, J. Vernell; Theron, J. J.; Oosthuizen, J. du P. - 1925
Persistent link: https://www.econbiz.de/10003366413
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"Stinkblaar" : (datura spp.) family solanaceae
Landsell, K. A. - 1927
Persistent link: https://www.econbiz.de/10003367111